单选题 Few of today’s occupations require (　　) physical activity, and much of our leisure time is spent sitting still.

单选题 The (　　) will be refunded after you buy the music record.

单选题 If we don’t solve these pollution problems, we will be in a very (　　) situation.

单选题 If you find you are wrong, be sure to correct yourself and apologize to those who you have(　　).

单选题 Scientists theorize that the amount of these chemicals (　　) by a person’s brain quite possibly indicates how much faith the person has in his or her doctor.

单选题 I’m in real trouble. I’m in the middle of an assignment and my computer has (　　).

单选题 Websites promoting re-gifting and green gifting are (　　) in France, with many reporting a rise in business.

单选题 The Internet company Yahoo has bought an (　　) created by a British teenager in a deal reported to be worth tens of millions of dollars.